Tubular coupling



NW. z, wm wmm W. A. WHLSGN TUBULAR COUPLING A Filed` June 23, 1924Patented Nov. 2, 1926. i v p' UNITED STATES' PATENT OFFICE.

ROBERT A. 'WILSON, OE DIALLAS', TEXAS, ASSIGNOR TO THE GUIBERSONCORPORA- fTION, OF DALLAS, TEXAS, A CORPORATION OF DELAWARE.

TUBULAR coUPLING.

Application flie'a June 28, 1924. seril'uo. 721,870.

This invention relates to new and useful screw threaded end of a welldrilling pi e, improvements in tubular couplings. tubing or othertubular conductor 11, Wlth This application is in part a continuationwhich the joint is used. The socket and of my application Serial No.`475,470 which threaded end are sli'ghtly tapered and 'the 5 haseventuate'd into Patent 1,507,877, Sept. threads are comparatively finewith rela- 9, 1924, and also has to do with certain imtion to thethreads of the pin. The member provements therein. has a longitudinalaxial bore 12, while a The invention relates particularly to shoulder12'. at the bottom'of the socket couplings of the box and pin type, suchas 10' provides for the end of the conductor IH tool joints vforconnecting the drill pipe 11, thus permitting the same diameter lfor ofa rotary well drilling rig. both the bore and the conductoi'.

The obfect of the invention is to utilize The pin member constitutes oneportion thel quick coupling and' uncoupling features or' element of thejoint or coupling, while of the invention disclosed in the aforesaid abox member `13 constitutes the other eleapplication and to locate thecontinuous ment or portion thereof. The box member 70 threads at theupper end of the pin instead has a screw threaded socket 13' atits-lowei' of at the bottom of| the box. end similar to the socket 10'for receiving An advantage of the improvement isvthat the screw threadedend of a tubular conthe continuation threads may be cut on the ductor14. The socket 13' has a shoulder 15' 2" cxposed surface of the pin,thus making the and van axial bore 15 of the same diameter 75 box moresimple to produe. as that of the conductor 14 and the bore 12.

Another object is to provide a box and The conductor 11 is screwed intothe box pin having threadpanels for quick coupling member 13. Thisstructure may vary acund uncoupling, whereby a less taper may cording tothe use and particular conductors be employed and a passage through thebox which are coupled. Owing to the Comparand pin having the samediameter as that atively fine screw threads of the parts they of thetubing, may be obtained. Will remain engaged when the coupling is Afurther object is to provide an annular unscrewed orl broken. collar atthe top of the in Lin which the The member 10 is provided with a defmcontinuations of the threa smay be cut and pending tapered pin 16. Thispin is not 95 which permits .the forming of an annular tapered to thedegree which has been the shoulder and a tight fit in the upper end ofpractice in this art,| its angle of inclination the box, m to theperpendicular being` much less acute A construction designed to carryout the than that of the pins made 'under Whittier invention will behereinafter described to- Patent N0- 964,35`3, or as 'is shown in my co-90 `gether with other features of the invention. pendng applicationSerial No.y 475,470. By The invention will be more readily under- 'thisconstruction the bore 12 may be given stood from! a reading of thefollowing specthe same diameter as the conductor, whereas ifir'ationan'd by reference to the accompanyin the former structure the acutetaper' of 40 ing drawings, in which an example of ythe the pin reducedthe diameter about oneinvention is shown, and wherein: third. The boxmember has a countersunk Fig. 1 is an elevation of a pin member taperingwell (17 in its upper end for`.reconstructed in accordance with myinvenceiving the pin 16. v tion, The pin is provided With' mutilated Fg-2 is a vievy of a box constructed in threads 18 arranged in two panels,each ocm0 accordance with my invention, a portion cupying substantiallyone-quarter of the cirbeing shown in section, and the box beingcumfcrence of the pin and disposed dialocatedto receive the pin'of Fig.1, metrically opposite each other. This pro- Fg. 3 is an elevation ofthe pin at right vides vgaps between the panele. The panels angles 'toFig. 1, and are formed'of coarse threadsi'the convolu- Fig. 4 is, avert'ical sectional view of the tions of which are preferably spacedsuflicoupling assembled. i ciently to admit the forming of a second ofIn the drawings the numeral 10 designates the same pitch, intermediatesaid convolua pin member which has a screw threaded tions. The secondthread is started diametsocket 10' at its upper end to receive, therically opposite from the first thread. From no the foregoing it will beseen that one of the threads of the pin, begins at the lower end of onepanel While the other thread begins at the lower end of thediametrically opposite panel. By this arrangement ample thread bearingis had and a coarse thread is available. It is within the seo e of the".nvention to utilize a single threa The well 17 i's provided With screwthreads 19 which 'are mutilated and formed into diametrically opposedpanels having substantially the same width as the'gaps between thepanels of the pin, so that the pin may be inserted in the well 17 andthe threads 18 thereofl` received in the gaps between the threads 19 ofthe box 13. It is nierely necessary to insert the pin 16 in the well 17and give the member 10, a quarter turn or rotation, whereby the threads18 ride into the threads 19 and couple the parts of the joint. together.

In order that the screw threads will properly mesh and to prevent theirblunt ends from abutting and making necessary the longitudinaladjustment of the pin member, I provide means for supporting the pinwhen it is inserted in the well,whereby the threads are positioned inmeshing relation. The threads 19 do not extend to the top of the well 17thus leaving an annular space p which receives an annular collar 20formed v at the upper end of thev pin 16. An outwardly drected shoulder21 on the member 10 overhangs the collar. This collar fits snugly in theupper endof the well and the shoulder 21 rests upon the top of the box,when the parts are screwed together.

Continuations 18' and 19' of the screw i threads 18 and 19 are formed inthe collar 20 at the upper ends of lthe panels and these .threadcontinuations or extensions bridge the gaps between the panels of thepin 16. Thus when the pin is inserted in the well the extension 18' and19' are supported upon the upper threads 19 of the panels of Ithe welland guide the threads 18 between the threads 19, when thel member 1.0 isrotated. By this arrangement no relativeadjustment of the members isrequired to mesh 'the threads and a quick coupling is effected. Thethread extensions terminate on opposite sides of the pin and arecontinuations of alternate threads.

This structure obviates the forming of the thread extensions at thebottom of the well and it is not necessary that the pin engage theshoulder at the bottom of the well, but the same principle of extendingthe threads across the ends of the gaps is employed as in the aforesaidapplication.

Various changes in the size and shape of the different parts, as well asmodifications and alterations may be made within the scope of theappended claims..

What I claim, is:

1', A coupling for tubular .conductors comprising in combination, a pinmember, a tapered pin carried by said pin member and having screwthreads arranged in opposite longitudinal panels with Vertical gapstherebetween, an annular collar at the upper end of the pin, the threadsat the upper end of each panel being cut into the lower portion of saidcollar and extended across the tops of said gaps, an annular shoulder onthe member extending outwardly and overhanging the collar, a box memberhaving longitudinal thread panels with `gaps therebetween, the gaps ofthe box member being free from threads at its lower end, the upper endof the box receiving the collar, and the shoulder of the pin memberriding on the upper edge of the box, whereby the pin is supported andits lower end is free from contact with the bottom of the box the lengthof the box opening being greater than the length of the thread panels ofthe 2. A coupling for tubular conductors comprising in combination, apin member, a tapered pin carried by said pin member and having screwthreads arranged in opposite longitudinal panels with Vertical gapstherebetween, an annular collar at the upper end of the pin. the threadsat the upper 'end of each panel being cut into the lower portion of saidcollar and extended across the tops of said gaps, an annular shoulderonl the member extending outwardly and overhanging the collar, a boxmember having longitudinal thread panels with gaps therebetween. thegaps of the box member being free from threads at its lower end, theupper end of the box receiving the collar, and the shoulder of the pinmember riding on the upper edge of the box, whereby the pin is supportedand its lower end is free from contact with the bottom of the box, thethreads of the pin and box member being double, whereby the pin may beinserted with either thread panel of the pin in either gap of the boxmember, the length of the box opening being greater 'than 'the length ofthe thread panels of 'the pin.

In tcstimony whcreof atfix niv signature.

ROBERT A. WILSON.

